Malicious PDF — malware analysis report

Static analysis result for SHA-256 659fa15f60d23997…

MALICIOUS

PDF

72.1 KB Created: 2021-01-09 14:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8a938f5537697cc76833d89215b53a01 SHA-1: 22c718dd6b3fce020561f1c4df8b3a37f22dca2c SHA-256: 659fa15f60d23997b8f78dace4e93318f63f75dc736de1aaaa2b547509a5596b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain keywords related to 'Star Wars clone wars episodes', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/wb?keyword=star%20wars%20clone%20wars%20episodes%20to%20watch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_5fa0b2717a2dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5feea84132b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5f9ab6126be9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5fc710813be1c.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/uyZhjjf/crash_test_dummy_video_car_seat.pdfIn PDF document text
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/30a3647f.pdfIn PDF document text
    • https://dokupikojezox.weebly.com/uploads/1/3/4/7/134740590/dowojixoxegoz.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/d6jhgfO/quiz_logo_game_answers_level_germany_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f906ac0f02a1.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/hdrjfic/buzitulodulinuwobi.pdfIn PDF document text
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/xonadagalozudifipen.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/9543977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/cambio_climatico_en_bolivia_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/79721228562.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/vascular_malformation_clinic_sydney_children_s_hospital.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/type_token_ratio_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/14991827196.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4F 5356 bytes
SHA-256: 69ad0e6f1397e29935b94fd10b3ad9d1f2529454aaecc51b8be75dedf1736b92
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 10620 bytes
SHA-256: e3157edbc0ca77cd82d1068838059002bccf6a88eaecd8bac278a7ce6a5ba3aa

Open this report in the interactive analyzer, or submit your own file for analysis.